Recycle Analysis of Polymers

This shows the recycle fractionation of lauryl stearyl thiodipropionate using GPC K-2001 (a column for organic SEC (GPC)).

Sample : Lauryl stearyl thodipropionate
Dilauryl thiodipropionate
Distearyl stearyl thiodipropionate
Lauryl stearyl thiodipropionate

Columns      : Shodex GPC K-LG (8.0mmID*50mm) + K-2001 (20.0mmID*300mm)
Eluent       : CHCl3
Flow rate    : 3.0mL/min
Detector     : Shodex RI
Column temp. : 50deg-C

The color of some impurity substance in a resin changed to yellow. And, the substance was fractionated by recycle analysis using GPC H-2001 and the chemical structure was determined.

Sample : Butylated hydroxytoluene, BTH

Columns      : Shodex GPC H-2001 (20.0mmID*500mm) x 2
Eluent       : CHCl3
Flow rate    : 3.0mL/min
Detector     : UV(254nm)
Column temp. : Room temp.

S. Nakamura et al, J. Chromatgr. , 83 (1973) 279

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